SCJP 1.4 (310-035) Quick Revision Notes

Section 1: Declarations and Access Control

An example of creation of instance of an inner class from some other class:
class Outer
{
   public class Inner{}
}

class Another
{
   public void amethod()
{
   Outer.Inner i = new Outer().new Inner();
}
}

Section 2: Flow Control, Assertions, and Exception Handling

The setClassAssertionStatus() returns a boolean instead of throwing an exception, if it is invoked when it's too late to set the assertion status (i.e., if the named class has already been initialized).

Section 3: Garbage Collection

Section 4: Language Fundamentals

There are three top-level elements that may appear in a file. None of these elements is required. If they are present, they must appear in the following order:

1. package declaration
2. import statements
3. class definitions

Section 5: Operators and Assignments

Section 6: Overloading, Overriding, Runtime Type, and Object Orientation

A static method can't be overridden to non-static and vice versa.

Section 7: Threads

There are two ways to mark code as synchronized:

•  Synchronize an entire method by putting the synchronized modifier in the method's declaration.

•  Synchronize a subset of a method by surrounding the desired lines of code with curly brackets ({}).

Section 8: Fundamental Classes in the java.lang Package

SECTION 9: THE COLLECTIONS FRAMEWORK

The main difference between Vector and ArrayList is that Vector is synchronized while the ArrayList is not.